The former Oulu Province in Finland was divided on two regions, nine sub-regions and 43 municipalities.
Northern Ostrobothnia
edit- Oulu sub-region
- Oulunkaari sub-region
- Ii (Ijo)
- Pudasjärvi
- Utajärvi
- Yli-Ii
- Raahe sub-region
- Siikalatva sub-region
- Nivala–Haapajärvi sub-region
- Ylivieska sub-region
- Koillismaa sub-region
Kainuu
edit- Kehys-Kainuu sub-region
- Hyrynsalmi (8)
- Kuhmo (6)
- Puolanka (9)
- Suomussalmi (7)
- Kajaani sub-region
- Kajaani (Kajana) (1)
- Paltamo (3)
- Ristijärvi (4)
- Sotkamo (5)
- Vaala (2)